// -------------------------------------------------
// BlinKit - BlinKit Library
// -------------------------------------------------
//   File Name: DistributedNodes.h
// Description: DistributedNodes Class
//      Author: Ziming Li
//     Created: 2021-07-21
// -------------------------------------------------
// Copyright (C) 2021 MingYang Software Technology.
// -------------------------------------------------

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 */

#ifndef DistributedNodes_h
#define DistributedNodes_h

#include "core/dom/Node.h"
#include "wtf/HashMap.h"
#include "wtf/Vector.h"

namespace blink {

class DistributedNodes final {
    DISALLOW_NEW();
public:
    DistributedNodes() { }

    PassRefPtrWillBeRawPtr<Node> first() const { return m_nodes.front(); }
    PassRefPtrWillBeRawPtr<Node> last() const { return m_nodes.back(); }
    PassRefPtrWillBeRawPtr<Node> at(size_t index) const { return m_nodes.at(index); }

    size_t size() const { return m_nodes.size(); }
    bool isEmpty() const { return m_nodes.empty(); }

    void append(PassRefPtrWillBeRawPtr<Node>);
    void clear() { m_nodes.clear(); m_indices.clear(); }
    void shrinkToFit() { m_nodes.shrink_to_fit(); }

    bool contains(const Node* node) const { return zed::key_exists(m_indices, node); }
    size_t find(const Node*) const;
    Node* nextTo(const Node*) const;
    Node* previousTo(const Node*) const;

    void swap(DistributedNodes& other);

    DECLARE_TRACE();

private:
    std::vector<Member<Node>> m_nodes;
    std::unordered_map<Member<const Node>, size_t> m_indices;
};

}

#endif
